[PUP] Ok, what is your thoughts about get home engines

[John Marshall]

I don't think the fact that Nordhavn does or does not make them should 
change the subject. The real question is whether such beasties exist in the 
wilds of trawler-dom and whether they work.  I've never seen one.

The info Ken Williams passed along was interesting... that PAE's experience 
with 500 or so boats says that bad fuel and fouled props share the blame 
nearly equally for taking the main engine down for extended periods. I'd 
always assumed a fish net on the main  prop would be curtains for the wing, 
but the wing prop is mounted quite a bit further forward on most boats. If 
the net is wound up on the main and trailing, the wing could be OK. The fact 
that one of the boats on his Atlantic crossing ran for days on the wing (all 
the way to shore) with a fouled prop they couldn't clear is better 
performance than I'd expected.

Not sure about other mfgs, but most Nordhavns have a sanitized fuel supply 
for the wing. Mine is about 10 gallons, and it can only be filled via the 
transfer pump (I can draw supply from any of the four tanks) which pumps 
through an isolated Racor with 2 micron element (different filter than the 
main engine uses). The supply from the wing tank is then run through a 10 
micron Racor before it gets to the wing engine, which has a third on-board 
filter. Given that water gets separated in both Racors, I can't imagine a 
fuel problem that would escape all that filtration.

Worst comes to worst, at a gallon an hour burn rate, that tank gives me ten 
hours to sort out a severe fuel problem before I have to refill it.

Also, the wing engine is a stone-simple mechanical diesel (Toyota block 
Lugger) with manual morse controls, unlike the JD main engine that has 
Mathers fly-by-wire electronic throttle and transmission with computer ECU 
control. Its nice to have some proven, ancient technology on board to 
counterbalance all that electronic diesel wizardry.

John Marshall


----- Original Message ----- 
From: "L. Bruce Jones" <bruce at ussubmarines.com>
To: <passagemaking-under-power at lists.samurai.com>
Sent: Tuesday, October 28, 2008 7:25 PM
Subject: Re: [PUP] Ok, what is your thoughts about get home engines


> O.K. Does anyone on this forum have a twin engine single shaft
> vessel, or does the fact that Nordhavn does not make one, take the
> idea out of contention?
> -- 
> =======================================================================
> L. Bruce Jones                 U.S. SUBMARINES, INC.
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